Equal distance offset approach to representing and process planning for solid freeform fabrication of functionally graded materials

Xu, Anping; Shaw, Leon L.

doi:10.1016/j.cad.2005.01.005

Cited by 41 publications

(19 citation statements)

References 27 publications

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“…In Fig.4, the heterogeneous surface is constructed from five different homogeneous material curves. In this case, the surface may be fabricated by using EDO approach and suitable SFF machine [6] . In Fig.5, the heterogeneous surface is constructed from five different heterogeneous material curves, which is more flexible than the former one in terms of modeling material composition variation.…”

Section: Inverse Construction Methods Of Heterogeneous Surfacesmentioning

confidence: 99%

“…Most of the existing HO representation methods [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] suffer from some obvious limitations on the objects with freeform surfaces, especially for non-uniform rational Bspline (NURBS) surface. B-spline representation introduced by Yang and Qian [22,23] can represent B-spline heterogeneous curves and surfaces, but it is not fit for the elementary surfaces such as conicoid and plane.…”

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confidence: 99%

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An approach to representing heterogeneous non-uniform rational B-spline objects

Zang

2011

Trans. Tianjin Univ.

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Abstract： The representation method of heterogeneous material information is one of the key technologies of heterogeneous object modeling, but almost all the existing methods cannot represent non-uniform rational B-spline (NURBS) entity. According to the characteristics of NURBS, a novel data structure, named NURBS material data structure, is proposed, in which the geometrical coordinates, weights and material coordinates of NURBS heterogeneous objects can be represented simultaneously. Based on this data structure, both direct representation method and inverse construction method of heterogeneous NURBS objects are introduced. In the direct representation method, three forms of NURBS heterogeneous objects are introduced by giving the geometry and material information of control points, among which the homogeneous coordinates form is employed for its brevity and easy programming. In the inverse construction method, continuous heterogeneous curves and surfaces can be obtained by interpolating discrete points and curves with specified material information. Some examples are given to show the effectiveness of the proposed methods. Keywords： heterogeneous object; non-uniform rational B-spline (NURBS); material data structure; direct representation method; inverse construction method

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Section: Inverse Construction Methods Of Heterogeneous Surfacesmentioning

confidence: 99%

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confidence: 99%

An approach to representing heterogeneous non-uniform rational B-spline objects

Zang

2011

Trans. Tianjin Univ.

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“…Siu and Tan [3] proposed a 'source-based' heterogeneous solid modeling scheme and defined extended operations in addition to the CSG type Boolean operations to model the grading sources. Xu and Shaw [4] introduced an equal distance offset (EDO) method in which a 3D CAD model is sliced into a series of 2D layers and each layer is further divided into several sub-regions enclosed. Kou [5] presented a prototype software package for heterogeneous modeling (CAD4D) which was developed with ACIS and OpenGL.…”

Section: Introductionmentioning

confidence: 99%

HO-CAD: A CAD System for Heterogeneous Objects Modeling Based on ACIS and HOOPS

Zang

et al. 2009

2009 Second International Conference on Intelligent Networks and Intelligent Systems

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This paper presents a CAD system, termed as HO-CAD, for heterogeneous object modeling based on ACIS and HOOPS. The HO-CAD system is composed of four modules which are used for creation, representation and visualization of geometry and material composition information, respectively. In the process of the software designing and programming, such considerations as interactivity, open ability, integrating ability, independence and extensibility are taken by combining the geometric modeling function of ACIS with rendering and visualization functions of HOOPS in the environment of VC++ 6.0. The architectures of ACIS and HOOPS as well as the implementation of three key modules, i.e. interactive module, modeling module, and data management module, are briefly introduced. At last, some examples of heterogeneous objects modeled by this system are illustrated.

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“…Path generation needs to handle as much the change in process speed and the transition time at the borders [92]. A specific branch of research is dedicated to the optimisation of tool generation path including studies related to the improvement of the scanning mode [93,94], geometry slicing strategies [95,96], optimal material deposition [97,98], multi-directional AM [99], tool path anticipation procedures [100]. -Process selection: different technologies are developed to enhance the capabilities of AM like jet printing [26,101], friction stir AM [102], welding based AM [94], ultrasonic AM [103], electrochemical AM [104], micro-plasma powder deposition [105], Solid freeform fabrication [106] and related variants such as selective laser sintering [107,108], or directed light fabrication [20], selective infiltration manufacturing [109]).…”

Section: Optimisation In Additive Manufacturingmentioning

confidence: 99%

Challenges of additive manufacturing technologies from an optimisation perspective

Guessasma

Zhang

Zhu

et al. 2015

Int. J. Simul. Multisci. Des. Optim.

100

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-Three-dimensional printing offers varied possibilities of design that can be bridged to optimisation tools. In this review paper, a critical opinion on optimal design is delivered to show limits, benefits and ways of improvement in additive manufacturing. This review emphasises on design constrains related to additive manufacturing and differences that may appear between virtual and real design. These differences are explored based on 3D imaging techniques that are intended to show defect related processing. Guidelines of safe use of the term ''optimal design'' are derived based on 3D structural information.

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Equal distance offset approach to representing and process planning for solid freeform fabrication of functionally graded materials

Cited by 41 publications

References 27 publications

An approach to representing heterogeneous non-uniform rational B-spline objects

An approach to representing heterogeneous non-uniform rational B-spline objects

HO-CAD: A CAD System for Heterogeneous Objects Modeling Based on ACIS and HOOPS

Challenges of additive manufacturing technologies from an optimisation perspective

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